1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1286195e720015b5a238403c534c9cde0a77212da14daffcd397b6da8ad12be. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e59b0c9a-6dc1-40e8-86a6-4753e0169ac9.json and https://artists.proofprofile.net/proofs/artist/e59b0c9a-6dc1-40e8-86a6-4753e0169ac9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd7c024657a252d4045b80027c3a107dc1df944c7e742db6abcf0c3d7dd4b71. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2027001.
Nickelodeon Mix It Up! Vol. 8: Rap Rascals (The Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54fd9a84dc22d0da52dd4678ec7cba86fd9f3ff9b716cb47ea4c6ccdddb850a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2403006.
Nickelodeon Mix It Up! Vol. 7: Viva Fiesta (The Remixes)
Nickelodeon Mix It Up! Vol. 5 - Hip Hop Evolution (The Remixes)
SpongeBob SquarePants Theme Song - Hip Hop Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663127e3f7dc45ad6291b084d48235534c3b80d0a002e7a35a5561aed6748808. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2327001.
The Loud House Theme Song - Hip Hop Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc305ab19991c79f45da1d92e706ae17ebe75a124347f0df641a611bbeea86dd5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2327006.
Teenage Mutant Ninja Turtles Theme Song - 2012 - Hip Hop Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466f28d4402f8e010dd189d1f34db34ca2b2d39fc5dda11a9a1f503061cc81fe. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2327007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a060fb2579db52db33e0ca66d4a2b247feeae5b36768fa16bfa744cc6538ac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2112005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97460bd4b76b5d1da3cdb771501072b8cca5bd1afaf46a153d8709af2d32bdd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2112008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9c5af12c42bb95b88a907c026096e327ecb034d7d9d6638ae6881dc912ab4a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2112001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df8d41188bfe80ee2da6a67c7fea7d87f626c0e5a07ae36ca5ea50a6c01e417. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2112009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ca79254421f7972738cd734c911f9ee19830276a96d52f4e0ccdabba917469. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2112007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6162eefdab1456b30caef18dd74afab2591ad793a7447d0a9868c3323795b77. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2112006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5edcdad8a8ed82c762e584cb45d84a6bda7123b511cdde403b2dc1997b09c2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2112004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d4159b5e8e69e9b48f8c07bf5b6c32e6e9e12eb54a612b305908d596ad816f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2212001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd441c133531d1a94767608d9b333e4bf56ab791401a0d923e356a836b9f91c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USN1R2103001.